Assessment of heavy metal accumulation and potential risks in surface sediment of estuary area: A case study of Dagu river

Marine Environmental Research, Год журнала: 2024, Номер 196, С. 106416 - 106416

Опубликована: Фев. 19, 2024

Язык: Английский

---

Environmental risk assessment, spatial distribution, and abundance of heavy metals in surface sediments of Dal Lake-Kashmir, India

Environmental Advances, Год журнала: 2024, Номер 17, С. 100562 - 100562

Опубликована: Июнь 26, 2024

This study assesses the pollution levels of Dal Lake in Kashmir, India, focusing on spatial distribution, abundance, and risk heavy metals surface sediments. Granulometric analysis revealed a complex interplay sedimentation processes, characterized by wide range sand (1.25% to 47.03%), silt (2.65% 58.21%), clay (38.35% 94.48%) contents across sediment samples. The average CaCO3 content 18.65% is notably higher than observed other regional global lakes, indicating production or preservation carbonates. organic matter (OM) within samples varied significantly, ranging from 3.9% 25.01%, reflecting sedimentary dynamics. Utilizing environmental assessment indices (Contamination Factor, degree contamination, Pollution Load Index, Potential ecological index, Enrichment Geo-accumulation Index) multivariate statistical analyses (Pearson's Correlation, Principal Component Analysis, Cluster Analysis), it examines contamination Iron, Manganese, Cobalt, Chromium, Copper, Nickel, Lead, Zinc 32 Results indicate variability metal concentrations, with Cobalt 24.1178 ppm 52.95 Iron 25,800.99 164,747.82 ppm, highlighting areas significant potential risks, especially which exceeds safe for benthic invertebrates. Index suggests moderate lake. These findings emphasize urgent need continuous monitoring effective management protect Lake's integrity.

Язык: Английский

---

Trace element of small lake sediments sensitively recorded environmental changes in the watershed: Implications for mining history and urbanization

Ecological Indicators, Год журнала: 2023, Номер 158, С. 111422 - 111422

Опубликована: Дек. 20, 2023

Lake sediments serve as a sink for trace elements and provide record of watershed changes resulting from anthropogenic activities natural processes. In this study, eight in the Aha, an urban lake Guiyang City, Southwest China, were investigated to reveal effects historical coal mining rapid urbanization watershed. Results showed that median contents measured order Zn (220.00 mg/kg) > Ni (98.16 Cr (70.26 Cu (66.20 As (58.14 Co (41.66 Pb (28.33 Cd (1.39 mg/kg). Except Pb, concentrations Cd, As, Zn, Ni, Co, 4.64, 2.33, 2.00, 1.92, 1.81, 1.09 times higher than regional background values respectively. Trace element center significantly rest sediment cores, relatively stable hydrodynamic processes region. Vertical variation indicated fluctuations intensity tributaries effectively tracked by variations levels middle layer Youyu River Baiyan estuaries. The elevated surface Jinzhong estuary reflected basin over past 20 years. PMF analysis demonstrated mixture activities, Cu, originated mining. This study provides important information comprehending small-scale lakes environmental changes.

Язык: Английский

---

The impact of toxic elements on the quality of surface soil in Albania

Environmental Monitoring and Assessment, Год журнала: 2025, Номер 197(6)

Опубликована: Май 13, 2025

Язык: Английский

---